Atomic Structure and Average Atomic Mass

Front

What is the formula for the compound formed by Ca⁺² and F^-1?

Back

CaF₂

Front

What is average atomic mass?

Back

The weighted average of the masses of an element's isotopes, taking into account their relative abundances.

Front

Define isotope.

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.

Front

What is the most abundant isotope of Nitrogen?

Back

Nitrogen-14.

Front

What is the identity of an element with atomic number 38 and 47 neutrons?

Back

Strontium-85.

Front

What does the term 'relative abundance' mean?

Back

The percentage of a particular isotope in a naturally occurring sample of an element.

Front

How many neutrons are in an isotope of Calcium with a mass number of 42?

Back

Calcium has 20 protons, so it has 22 neutrons in Calcium-42.

Front

What is the formula for calculating average atomic mass?

Back

Average Atomic Mass = (mass of isotope A × abundance of A) + (mass of isotope B × abundance of B) + ...